Artificial teeth.



F. A. CARTER. ARTIFICIAL TEETH.

APPLICATION FILED JAN. 3, 1911.

1,036,562. P tented Au 27, 1912 W1Jne5se5: [raven/for 1 new. 659F567 5 C W Attarrwgs FRANCIS A. CARTER, OF CHICAGO, ILLINOB.

ARTIFICIAL TEETH.

Specification of Letters Patent.

I Patented Ali 2 27, 1912-.

Application filed January 3, 1911. Serial No. 600,414.

. (Case 3,) of which the following is a full,

clear, concise, and exact description, reference being had to the accompanying drawings, forming a partof this specification.

'My invention relates to an improved 2 means for use in connection with the conerly in position, so that they may beijref struction of cast metal "plates for supporting artificial teeth.

By my invention artificial teeth are interchangeably secured to the cast metal plates .in such a manner that, if for any reason one of the teeth becomes broken in use,it may readily be replaced by a similar tooth, without remodeling'i'n any way the metal plate or parts permanently carried thereby.

Anessential feature of my invention consists in individual backing plates for the several teeth; each backing plate being provided with projections adapted to be engaged and retained bythe mounting plate during the casting operation, and conformed also to-engagethe teeth-to hold them prep:

moved subsequently, if necessary,'and new f teeth applie The several drawings illustrating my in- I -vention are as follows:

- Figure 1 is a perspective view of a model of the patients mouth and a wax pattern of thevplate in placethereon, showing some of the teeth mounted upon the pattern, while others of the teeth have been removed to show the mounting means. Figs. 2, 3 and 4 show side views of vthe teeth removed from the mounting means shown in Fig. 1. Fig. 5

' is a transverse sectional view through the teeth shown in Fig. l, to illustrate the relation between the teeth, their mounting means, and the. wax pattern supporting them. Fig. 6 shows in sectional view, along the line 66 in Fig. 5, a portion of the mold made by means of the wax pattern shown in Fig. 1. Figs. 7 and 8 are enlarged transverse sectional views of two of the teeth shown in Fig. 5, removed from their backing lates to more clearly show the construction employed. Fig. 9 shows in a view similar to Figs. 7 and 8 a modified form of backing plate. Fig. 10 is a vertical sectional view through a modified form of backing plate and tooth, which backing plate is shown in face view in Fig. 11. Fig. 12 shows in a view similar to Figs. 7 and 8 another modified form of backing plate.

Similar numerals refer to similar parts throughout the several views.

In order to clearly show the advantages of my improved construction, it is desirable to consider the manner'in which. it is used in mounting teeth upon cast metal mounting plates. In doing'this a model 1 is first made. as is customary in the art, of the mouth of the patient for whom the plate is to be made. A thin sheet of beeswax 2 is applied to the model 1 and warmed and shaped to closely fit such model, after which the teeth 3, together with their backing plates, are placed in position upon the wax pattern 2, so that they will occlude properly with the teeth of the other jaw. Melted beeswax is applied around the backing plates to build up the pattern 2 and securely hold the backing plates in position.

The backing plates may be of different conformation, as shown at 4., 5, and 6. The

construction of the backing plate 4 is shown 'backi.ng plate from its upper edge to receive the heads of the pins 8 extending from the lingual surface of the tooth 9. The backing plate 4 has extending from its lingual surface anchors 10, having enlarged heads to be surrounded by the wax forming the pattern 2, by means of which the backing plate 4 is securely held in position.

The backing plate 5 is shown more clearly in Fig. 8 and is provided with two slots 11, preferably of dove-tailed conformation, extending through the upper edge of the plate, as indicated in Fig. 1, and adapted to receive the heads of the pins 12 extending from the lingual surface of the tooth 13. The backing plate 5 has secured to its lingual surface a second plate 14, the edges of which arebeveled as indicated, to afford engagement with the wax of the pattern 2 during the adjusting operation and ultimately to afford engagement with the metal of the mounting plate,-so that the backing plate 5 may be securely held in proper po sition upon such mounting plate. The back ing plate 6 is formed, as indicated more clearly in Fig. 9, 'so that the portion of the backing plate which receives the heads 15 of the pins carried by the tooth 16 constitutes the anchors for retaining the backing plate 6 upon the wax pattern 2 'and' ultimately for engaging themetal of 'thecast plate. y

In Figs. 10 and 11 a modlfied constructionof backing plate 21 is indicated, adaptedzto engage the pins 22 carried by-the tooth 23 in a manner similar to that described I above-in connection with plate 1. In this modification, however, projectlng anchors.

.' 24Qare cut from the body of the backing '1 plate and bentaway from the lingual-sur- I backing plate 25 is formed with an anchor face of the tooth to be engagedby the wax of the pattern and ultimately to be surrounded and retained inplace by the metal of the cast plate.

' In the modification shown in Fig. 12 the 2.6 1n a manner similar to that shown in connection with the backing plate 6 in Fig.

The anchor 26 is Wider than the a n-',

chors shown in Fig. 9, in order that the single slot formed thereby may receive the two 'pins 27 secured in the tooth-28, since-the narrower teeth are not sufiiciently {Wide to space'the pins-27 far enough apart to engage separate slots in the backing plate. A backing plate similar to the plate 25 may be used for otherarrangements of the'pins 27 whether they are disposed transversely of the tooth 28 or not. I I

'An advantage secured by my improved backing plates is that bymeans of them it v F is'not necessary to especially; construct artiticial'teeth for use with them, as there are many forms of teeth on the market particularly adapted for use in the Way de-' So far as I- am aware I'am scribed above. the first to employ individual backing plates adapted to receive supporting devices caracking platesried by artificial teeth, which are provided with anchoring means to be engaged bythe metal of the cast plate to be thereby rigidly secured in proper position. I do not limit myself, therefore, to the particular construction described but desire to claim broadly any equivalent mounting means and also the combination of a base plate and such mounting means.

What I claim is:

1. As a means for supporting an artificial tooth from a cast metaliplate, an individual backing plate havinga supporting projection and provided with a slot for-receiving a pin carried by the tooth.

2. An individual backing plate for arti- FRANCIS A. CARTER. Witnesses:

ALBERT C; BELL,

R BERT F. BRACKE. 

